diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 63ff0db..1e976a0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ 3.6, 3.8 ]
+        python-version: [ 3.7, 3.8 ]
 
     steps:
     - uses: actions/checkout@v2
@@ -31,10 +31,6 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
-    - name: Install Python virtualenv for Github runner
-      run: |
-        python -m pip install --upgrade pip
-        pip install virtualenv
     - name: Start from clean state
       run: make clean
     - name: Run tests
diff --git a/case_utils/__init__.py b/case_utils/__init__.py
index a7184e2..0190a05 100644
--- a/case_utils/__init__.py
+++ b/case_utils/__init__.py
@@ -11,7 +11,7 @@
 #
 # We would appreciate acknowledgement if the software is used.
 
-__version__ = "0.2.0"
+__version__ = "0.2.1"
 
 import rdflib.util
 
diff --git a/dependencies/CASE-Examples-QC b/dependencies/CASE-Examples-QC
index 7a678bc..49e1bdf 160000
--- a/dependencies/CASE-Examples-QC
+++ b/dependencies/CASE-Examples-QC
@@ -1 +1 @@
-Subproject commit 7a678bc0bb99b9a722b6e5ba4b05ec4cd7525bd3
+Subproject commit 49e1bdf7d6f366dc18655ace5ea3043e84493767
diff --git a/setup.cfg b/setup.cfg
index 5837731..66d100d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -18,14 +18,13 @@ classifiers =
 # TODO The constraint on pyparsing can be removed when rdflib Issue #1190 is resolved.
 # https://github.com/RDFLib/rdflib/issues/1190
 install_requires =
-    # Note that numpy (pandas dependency) is only supported in Python >= 3.7.
-    pandas;python_version>='3.7'
+    pandas
     pyparsing < 3.0.0
-    rdflib-jsonld
+    rdflib >= 6.0.0
     requests
     tabulate
 packages = find:
-python_requires = >=3.6
+python_requires = >=3.7
 
 [options.entry_points]
 console_scripts =
diff --git a/tests/Makefile b/tests/Makefile
index 7857855..949f671 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -41,8 +41,7 @@ all: \
   $(top_srcdir)/setup.py \
   requirements.txt
 	rm -rf venv
-	$(PYTHON3) -m virtualenv \
-	  --python=$(PYTHON3) \
+	$(PYTHON3) -m venv \
 	  venv
 	source venv/bin/activate \
 	  && pip install \